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KW320B
Power Meter
- Revenue-grade power monitoring: KW320 meters deliver 0.1 class accuracy for high-confidence energy measurement in tenant billing, sub-metering, and energy management applications.
- 4-channel measurement capability: Supports L1, L2, L3, and neutral current inputs for detailed three-phase power monitoring and neutral current visibility.
- Advanced power quality analysis: Measures voltage/current THD, harmonics up to the 63rd, crest factor, K-factor, phase angle, and voltage/current unbalance.
- Flexible CT compatibility: Field-selectable inputs support both 333 mV current transformers and Rogowski coil CTs for retrofit and new-construction projects.
- Built for modern integration: Supports RS-485 Modbus RTU, BACnet MS/TP, Ethernet protocols, Wi-Fi, webserver access, SNMP, SMTP email, FTP, and other networked monitoring options.
- Comprehensive data capture: Provides real-time metering, bidirectional kWh/kvarh, demand forecasting, peak demand, max/min records, alarms, and 8 GB onboard data logging.
- Ideal for demanding facilities: Suited for data centers, industrial applications, renewable energy, LEED/green buildings, refrigeration, equipment load monitoring, and overhead cost reduction.
- Flexible installation options: Mounts in 4" round or IEC 92 mm DIN square openings, with optional DIN rail adapter and NEMA 4X prewired panel upgrade for retrofit projects.
- Certified and durable: cULus Listed, BTL Certified, CE, and RoHS2 compliant, with a UL94V-0 polycarbonate enclosure and ACI five-year limited warranty.
Product Overview
- Applications Building and Maintenance, Environmental Monitoring, Industrial and Manufacturing
- Compliance Note Measurement Standard: IEC 62053-22; ANSI C12.20 Environmental Standard: IEC 60068-2 Safety Standard: IEC 61010-1, UL 61010-1, IEC 61557-12 EMC Standard: IEC 61000-4/-2-3-4-5-6-8-11, CISPR 22, IEC 61000-3-2, IEC 61000-6-2/4 Outlines Standard: DIN 43700, ANSI C39.1
- Core Type Rogowski
- Data Interface BACnet Over IP
- Display Type LCD
- Electrical Connection Screw Terminal
- Enclosure Material Flame retardant polycarbonate
- Frequency 50/60 Hz
- Height 1.99 in
- Impedance Input 2MΩ/Phase
- Input_Current Note 150% of current sensor rating (mV CT’s) to maintain accuracy. Up to 6000 Amps w/ Rogowski Coils
- Length 3.8 in
- Measurement Type Single Phase, 3 Phase – Four Wire (WYE), 3 Phase – Three Wire (Delta)
- Mounting ANSI C39.1 (4” Round) or an IEC 92mm DIN (Square) form
- Mounting Plates Panel Mount
- Number of Channels Note 3 Channels, 0.525 VAC max, 333 mV CT’s or 0 to 6000 Amps with Rogowski Coils; Voltage Channels: 400 Volts AC (L-N), 690 VAC (L-L), 45Hz - 65Hz, 300Hz - 500Hz
- Number of Inputs 3
- Operating Humidity 5 to 95% RH, non-condensing
- Operating Temperature, Max 158 °F
- Operating Temperature, Min -13 °F
- Operating Voltage, Min 10 V
- Power Consumption 5 W
- Resolution 63rd Harmonic (50Hz or 60Hz type) or 15th Harmonic (400Hz type)
- Series ID KW320B
- Software Acuview Utility Software, Windows Based
- Storage Temperature, Max 185 °F
- Storage Temperature, Min -40 °F
- Update Rate Accumulated Parameter Update Rate: 1 sec ; Real Time Parameter Update Rate: 100 ms
- Voltage Measurement Range 100 to 400 Vac (L-N), 100 to 690 Vac (L-L), 100 to 400 Vac rms (1 phase), 100 to 300 Vdc
- Width 3.8 in
- Wire Gauge 22 to 14 AWG
- Withstand Voltage 3250 Vac
Supported Applications
The ACI KW320B Series Power Meter is a 3-channel device designed for power and energy monitoring via BACnet-IP. It supports real-time, True RMS measurement of instantaneous Voltage, Current, Power, Frequency, Harmonics, Phase Angle, Demand, Unbalance Factor, Running Time, and Power Factor. The meter acts as a BACnet server in any BACnet application, communicating natively over Ethernet to integrate with building automation systems.
Documented applications include tenant billing, data centers, sub-metering, equipment load monitoring, industrial applications, predictive maintenance, renewable energy, and green buildings. The series is approved for revenue applications under ANSI C12.20 Class 0.2 and IEC 62053-22 0.2s standards.
Operating Conditions & Performance
The KW320B Series provides 0.2% accuracy for Voltage, Current, Power, Reactive Power, Apparent Power, Power Demand, Reactive Power Demand, Apparent Power Demand, and Power Factor. Frequency measurement achieves 0.02% accuracy.
- Measurement Ranges: Voltage (10V~1000kV), Current (5mA~50000A), Power (-9999MW~9999MW), Reactive Power (-9999Mvar~9999Mvar), Apparent Power (0~9999MVA).
- Energy Ranges: Primary Energy (0~9999999.9kWh), Secondary Energy (0~999999.999kWh); Reactive and Apparent energy ranges follow similar primary/secondary structures.
- Frequency Types: 45.00~65.00Hz for the 50 or 60Hz type; 300.00Hz~500.00Hz for the 400Hz type.
The meter operates in ambient temperatures from -13 to 158°F (-25 to 70°C) and stores between -40 to 185°F (-40 to 85°C). Humidity ratings are 5 to 95%, non-condensing. Real-time parameter updates occur at a rate of 100 ms, while accumulated parameters update every 1 Sec.
Configuration Options
The series supports Single Phase and Three-Phase configurations (Four Wire WYE or Three Wire Delta). It is compatible with ACI 333mV CTs and flexible Rogowski Coil CTs, supporting up to 6000 Amps. The device features a built-in web interface for configuration and measurement reading via standard browser.
Mounting options include ANSI C39.1 (4" Round) or IEC 92mm DIN (Square) form enclosures. A KW320 DIN Rail Adapter (AXM-DIN, Item # 148248) enables mounting on a 35mm DIN rail.
- Power Supply: 100 - 415Vac, 50/60Hz or 100 - 300Vdc on terminals L and N. An external 1A/250VAC fuse is recommended.
- Communication: Ethernet based network using UDP for data transfer (BACnet Over IP Only). Supports Line or star topology with RJ45 connectors at 10/100 Mbit/s full duplex speed.
- Safety & Approvals: BTL Certified, CE, UKCA, RoHS2, cULus Listed (File # E359521). Enclosure material is Polycarbonate / UL 94V-0. Withstand voltage is 1500Vac Continuous and 2500Vac for 1 minute.
- Accessories: Three Fuse Pack (AK-03, Item # 150827) available as an inline fuse kit; 600V, 2A, Slow Blow.
Key Product Differences
The primary model configuration is KW320B-P1-D-IP (Item # 151262), described as a 3 Circuit Power Meter with Ethernet BACnet IP Only, 0.2 Class Accuracy, and support for 333mV and Rogowski Coil CT Input in a Panel Mount form.
Frequency variants are distinguished by their operating range: the standard type covers 45.00~65.00Hz (supporting both 50/60 Hz), while a specific variant supports 300.00Hz~500.00Hz for 400Hz applications, with harmonic resolution adjusted accordingly to the 15th Harmonic.
PDFs & Manuals
